Permutation-lock



I, (Kode/l.)

. F. E. ARNOLD.

PBRMUTATION LOCK.

ATTORNEYS.

N, PETERS. Phorum 'im nu.' mc,

UNITED STATES PATENT OEEICE.

FRED E. ARNOLD, OF CHICAGO, ILLINOIS.

F'ERMUTATlON-LOCK.

SPECIFICATION forming part of Letter! Patent No. 244,783, dated July 26, 1881.

Application filed April 14, 1881. (Model.)

-I'o all whom it may concern Be it known that I, FRED ERNEST ARNOLD, of Chicago, in the county of Cook and State of Illinois, have invented a. new and useful Improvement in Perm utation-Locks, of which the following is a full, clear, and exact description.

My invention relates to certain im provemex ts on that for which Letters Patent No. 2 14, dated October 5, 1880,were heretofore granted to me.

The present invention consistsin certain details hereinafter more particularly described, and pointed out in the claims.

In the accompanying drawings, Figure l is a plan view of the lock with the outer plate removed. Fig. 2 is longitudinal section. Fig. 3 is a detail view.

A is the casing inclosing the workin g parts of the lock.'

B is the bolt, arranged to slide inthe seat a.. The .rear end of the bolt is divided `longitudinally into two branches, b b, for engagement with a tongue, c, which extends from a plate, E, and which also engages with the teeth on the peripheries of the Wheels G.

D is a shaft extending through slotss in the casing A and round holes in the bolt B and the centers of the wheels Gr,and provided with knobs or milled heads F at the ends for operating it. It is also provided with a pin or studs, d d, for engagement with notches in the centers ot' the wheels G, by which means the wheels are turned, instead of by a pinion, as in my patent aforesaid. The wheels G are each provided with a radial notch, g, for engagement with the tongue e when the bolt is moved back.

C is a springpawl, provided with a tapering nose, c, for engagement with the teeth of the wheel G, the fixed end of the spring being attached to the bolt B instead of to the casing, as in my patent aforesaid, for the reason that ian lthis invention the wheels G move with the The bolt being locked, in order to unlock it the shaft or key D is adjusted so that the studs d d will engage with the notches of one of the Wheels G, and is turned in the direction of the arrow in Fig. 1 until the arm J abuts against the tongue c. The wheel is then turned in the reverse direction until the radial notch g is exactly in line with the tongue e. The shaft is then shifted, and the same motions applied to the other wheel or wheels, so as to bring all the notches g in line with the tongue c and allow the wheels and bolt to be moved back. Where there are three of the wheels G employed, the ring II and a wheel or plate, h, attached to the shaft D, enable the operator to adjust it to the center wheel by moving the shaft outward until the outer snrface of the wheel or plate is flush with the outer edge ofthe ring II. Afteradjustingthe center wheel the shaft D is pulled farther out, so as to bring the wheel or plate h clear of the edge ot' the ring, and the shaft is then free to move in the slots ot' the casingin order tomove back the wheels and bolt.

The setting' of the lock by the arms J, the securing of it in order to prevent it from being opened by an improper person, and the general principles of the operation are substantially the same as described in my patent aforesaid.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the slotted casing A, bolt B, having round hole, and the wheels Gr, having central notches, of the adjustable shaft, D, extending through the slots of casing, round hole of bolt, and center of wheels, and provided with the studs d d., as and for the purpose specified.

2. The combination of a sliding bolt, I3, having branches b b, a plate, E, having tongue e, and wheels G, having peripheral notches, the said bolt having a spring-pawl, e C, xcd thereto and carrying the wheels therewith, as and for the purpose described.

3. In permutation-locks, the ringLI and the plate h ou shaft D, in combination with three wheels, G,t'o enable the operator to adj ust the studs to the center wheel, as described.

' FRED ERNEST ARNOLD.

Witnesses:

EDWARD KociEMsKI, WALTER ARNOLD. 

